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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <jsonpb/jsonpb.h>
#include <android-base/logging.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/message.h>
#include <google/protobuf/util/json_util.h>
#include <google/protobuf/util/type_resolver_util.h>
namespace android {
namespace jsonpb {
using google::protobuf::DescriptorPool;
using google::protobuf::Message;
using google::protobuf::util::NewTypeResolverForDescriptorPool;
using google::protobuf::util::TypeResolver;
static constexpr char kTypeUrlPrefix[] = "type.googleapis.com";
std::string GetTypeUrl(const Message& message) {
return std::string(kTypeUrlPrefix) + "/" + message.GetDescriptor()->full_name();
}
ErrorOr<std::string> MessageToJsonString(const Message& message) {
std::unique_ptr<TypeResolver> resolver(
NewTypeResolverForDescriptorPool(kTypeUrlPrefix, DescriptorPool::generated_pool()));
google::protobuf::util::JsonOptions options;
options.add_whitespace = true;
std::string json;
auto status = BinaryToJsonString(resolver.get(), GetTypeUrl(message), message.SerializeAsString(),
&json, options);
if (!status.ok()) {
return MakeError<std::string>(status.message().as_string());
}
return ErrorOr<std::string>(std::move(json));
}
namespace internal {
ErrorOr<std::monostate> JsonStringToMessage(const std::string& content, Message* message) {
std::unique_ptr<TypeResolver> resolver(
NewTypeResolverForDescriptorPool(kTypeUrlPrefix, DescriptorPool::generated_pool()));
std::string binary;
auto status = JsonToBinaryString(resolver.get(), GetTypeUrl(*message), content, &binary);
if (!status.ok()) {
return MakeError<std::monostate>(status.message().as_string());
}
if (!message->ParseFromString(binary)) {
return MakeError<std::monostate>("Fail to parse.");
}
return ErrorOr<std::monostate>();
}
} // namespace internal
} // namespace jsonpb
} // namespace android
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